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Turnout relatively light

Turnout appears relatively light as Massachusetts voters head to the polls to decide the winners in a slew of key Beacon Hill and congressional primaries.

The Secretary of State’s office said just under 6 percent of Boston voters had cast ballots by noon Tuesday. That’s more than two years ago, but not as many as four years ago in a hotly contested Democratic primary for governor.

The only statewide races Tuesday are for the open auditor and treasurer seats.

There are also contested primaries for eight of the state’s 10 congressional districts, dozens of legislative seats and several district attorney offices.

Republicans are hoping to pick up more seats in Congress and at the Statehouse. Democrats are trying to hang on to their majorities.